Compensating cylinder for printing-presses.



G. HENDERSON. GOMPENSATING CYLINDER FOE. PRINTING PRESSES.

APPLICATION FILED OOT. 7 1912. u 1, 1 O 6,5O8, Patented Aug. 11,1914,

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c. HENDERSON. COMPENSATING CYLINDER FOB. PRINTING PBESSES. APPLICATION FILED OCT; 7, 1912.

1,106,508, Patented Aug. 11,1914.

24 44- Z 5 \l I V g I! 1 I! I 'Iru: AVUKRIS PET E RS CO-. PHOTO-LITHO" WASHINGTON. D. C-

pnrrnp STATES Parana orrron.

CARL HENDERSON, or OAK PARK, ILIjrNoIs, AssIenoa r0 MIEI-ILE PRINTING rnnss & MANUFACTURING lcoMPANY OF CHICAGO,

NOIS.-

To all whom it may concern:

Be it known that I,CARLHENDERSON, a citizen of the United States, residing at Oak Park, i the countyof Cook and State of Illinois, have invented certain new and useful Improvements in Compensating Cylinders for Printing-Presses, of which the following is a specification,

My invention relates to mechanism which maybe used in connection with a printing couple having as one member a rotatable impression cylinder.

In printingpresses as heretofore constructed considerable difliculty has been eX- perienced in obtaining exact cooperation between the impression cylinder and the form carrying member with which the said cylinder operates. The impression cylinder is ordinarily provided with bearers on its ends, these bearers engaging bearers on the sides of the form carrying member. Itwill be evident that in this construction ofprinting press there are three elements controlling the relative-movement of the impression cylinder and the form carrying mem ber: First, the gearing which actuates the cylinder and the form carrying member; second, the engagement between the bearers; and, third, the paper which engages the impression cylinder on one surface and the form on the other. If there is not exact correspondence between these various elements, the printing is apt to be imperfectly performed, and the form is subjected to undue wear. In order to obtain perfect cooperation it is now necessary to use great care and expend considerable time in preparing a printing press forthe printing operation.

The chief cause of the difliculty heretofore experienced in properly operating printing presses of the type which I have mentioned has resided in the lack of perfect cooperation between the impression surface and the form, since it is necessary to specially prepare the surfaces of both of these elements whenever the press is made ready to print, while, on the other hand, if the press is properly constructed in the be ginning, the proper cooperation between the gearing and bearers is always maintained.

It is the object of my invention to overcome the dificulties which have been mentioned above, and, in general terms, I accomplish this result by means of allowing a Specification of Lctters Patent.

ILLINOIS, A CORPORATION OF ILLI- COMPENSAT ING. CYLINDER FOR PRINTING-PRESSES.

Patented Aug. 11, 1914.

Application filed October 7, 1912. Serial No. 724,257.

any irregularities or lack of perfect cooperation between these elements will be compensated for by the automatic adjustment of said surface so that it has perfect cooperation with the form, thereby satisfactorily and perfectlyperforming the printing operation. These and other advantages of my invention will be more readily understood by reference to the accompanying drawings, which show a preferred embodiment of my improvements, and in which- Figure 1 is a fragmentary side elevation and partial sectional view of a printing press showing the impression cylinder and reciprocatory bed; Fig. 2 is a vertical section taken on the line 22 of Fig. 1; Fig. 3 is an enlarged fragmentary side elevation of a portion of the impression cylinder showing the compensating mechanism; Fig. 4 a horizontal section taken on the line 44 of Fig. 3; and Fig. 5 is an enlarged horizontal section take on the line 55 of Fig. l.

The printing pressis provided with the reciproeatory bed 10 operating on the rollers 11 11, according to the well-known system. Carried by the bearings 12l2 is a shaft 13, to which are keyed the bearers 14 which engage the bearers 15 on the sides of the bed 10. Each of the bearers 14 is provided with a bearing surface 16, these bearing surfaces being engaged by the ends of the impression cylinder 17, as clearly shown in Fig. 2. The cylinder 17 is provided with the usual gripper rod 18 carrying the grippers 19. One end of the gripper rod 18 extends through the stud 20 carried by the cylinder 17. This stud projects through a suitable aperture in the bearer 14, this aperture being somewhat larger than the stud 20 in order to allow relative movement of the cylinder 17 and the bearers 14.

As clearly shown in Figs. 1, 3 and 4, the cylinder 17 is provided with a cylinder drive stud 21 rigidly fastened to the cylinder and projecting into the aperture 22 in the bearer 14. This stud 21 is provided with adjusting screws 23-23, which may be rotated to provide the desired amount of lost motion between the bearers 14 and the cylinder 17, it being evident that on rotation of the bearers 14 the end of the aperture 22 will come in contact with one of "the adjusting screws 23 in order to elfect rotation of the cylinder 17.

'As best shown in Fig. 5, the cylinder 17 is provided with the gear segment studs 24,, which project through apertures 25 in theshown in the drawings.

Having thus described the various parts used in my invention, the operation of the same maynow be readily understood.

It will be clear that on account of the clearance which is provided for all parts extending from the cylinder 17 through the bearers 14, the cylinder and the bearers may have relative rotation between them. The paper to be printed is fed to the impression cylinder in the well known manner, and retained thereon by the grippers .19. WVhen the impression cylinder rotates to the starting. positlon the, gear segment 26 engages the rack 28, and, since the gear-segment is attached directly to the cylinder 17 and not to the bearers 1 1, the cylinder is brought into proper relation with the bed. In Fig. 1 the cylinder is assumed to rotate in a contra-clockwise direction, and after the gear.

segment 26 engages the rack 28 oncontinued rotation of the cylinder and continued movement of the bed 10 to the right the paper is printed. If there is not exact correspondence between the movements of the impression cylinder and the bed, this de- Copies of this patent may be obtained for fective action is compensated for by the lost motion betweenthe cylinder""'17 and the bearers 14, the permissible amount ofsuch lost motion being controlled by the adjust ing screws 23, so thatinstead of obtaining a blurred impression on. thepape'r and subjecting theform toundue wear the printing operation is perfectly performed. j p

It will be apparent t those skilled. in'the art that considerable change could be made in the exact parts which I have described} without departing from the spirit or scope of my invention or sacrificing any of its advantages. I lVhat I claim is: v In a printing press the .combinationof a reciprocatoryv bed' having bearers on 'its sides, a rotatable bearer adapted to engage each of the bearers ofsaid' bed, one ofsai'dg] rotatable bearers. having an aperture therethrough, an impression cylinder carried by said rotatable bearers and rotatable with respect thereto, a driving stud" projecting from one end of said cylinder through the aperture in one of said-rotatablebearers,

said stud being smallerthansaid aperture,

adjustable means for amount of lost motion between said stud and the. edgesofJsaid aperture, means for controlling the 1 actuating said rotatablebe'arers {and said bed, a rackcarried by said bed,and a gear segment carried by. said cylinder and adapt ed toengagev saidrack at a desired stage of the printing operation, whereby said cylinder and saidbed are broughtinto prede termined relation with each other, substantially as described.

Witnesses:

" CHAS. HIOKMAN,

GEO. R. WHA'rmJY.

five cents each, by addressing the Commissioner of, Patents.

Washington, 13.0. i

CARL nENDnnsoN. U 

